JPS63264332A - Wind-up device for tire constituent member - Google Patents

Abstract

PURPOSE:To prevent reliably growth of the diameter by restraining a shoulder part strongly, by a method wherein at the time of winding of a tire constituent member round a molding drum spirally under predetermined tension, the tension to be applied to the tire constituent member is varied so that it is low at a position close to the center in an axial direction of the drum and high at a separated position from the center. CONSTITUTION:When a tire constituent member 9 arrives at a starting position of winding-up, a frame approaches toward a molding drum 1 and a starting end of a tire constituent member 9 held by each wind-up guide 6 is pressed against the tire constituent member on the molding drum 1 for press contacting. A control instrument 35 applies a control signal to a solenoid brake 31 according to a program setting instrument 36 through an adjusting instrument 38 based on a detected signal through a detecting sensor 34. The tire constituent member 9 is wound on the tire constituent member on the molding drum 1 after it has passed through a festoon 13 and feedback control through a tension detecting sensor 39 is performed. Consequently, the tension of the tire constituent member 9 is controlled so that the same to be obtained at a position separated from the center of the molding drum 1 in an axial direction becomes higher than that to be obtained at a position close to the center.

Description

DETAILED DESCRIPTION OF THE INVENTION - No. 1 The present invention relates to a device for winding a tire component in a spiral manner around a forming drum.

[1] The present applicant previously proposed a high-speed pneumatic tire wrapped in Japanese Patent Application No. 131-48748; The tension of the tire component wrapped around the tire component is greater than the tension of the tire component wrapped around the axially central region. In this way, by making the tension in both sides larger than the tension in the center area, and strongly restraining part of the shoulder of the pneumatic tire,
Even if a pneumatic tire runs at an extremely high speed and a large centrifugal force is generated in a shoulder portion having a large rubber mass, abnormal diameter growth of the shoulder portion can be prevented.

However, in the past, no apparatus has been proposed for molding such pneumatic tires, that is, for winding tire constituent members spirally around a molding drum while controlling the tension.

1. For counting - The present invention provides a device suitable for performing the above-mentioned work, and includes a rotating forming drum, and a band-shaped tire component provided in front of the forming drum and supplied to the forming drum. A winding device that spirally wraps the tire component around the forming drum by moving in the axial direction of the forming drum while guiding the tire includes a guide, a tension applying means that applies tension to the tire component, and a tension applying means that applies tension to the tire component. A detection means detects the axial position of the tire component, and a tension applying means changes the tension applied to the tire component based on the detection result of the detection means, and winds the tire component at a position close to the axial center of the forming drum. A control means for controlling the tension of the tire component wound at a position farther from the center in the axial direction is greater than the i-force of the tire component attached to the tire component. be.

It is now assumed that the forming drum rotates, the winding guide moves in the axial direction of the forming drum, and the tension applying means applies tension to the tire constituent members. Thereby, the tire component supplied to the forming drum is wound helically around the forming drum under a predetermined tension while being guided by the guide. Here, the axial position of the tire component is detected by the detection means, and the detection result detected by the detection means is sent to the control means. The control means controls the tension applying means based on this detection result, and changes the tension applied to the tire component so that the tension applied to the tire component is small at a position close to the axial center of the forming drum and becomes large at a position away from it.

Thereby, it is possible to easily mold a pneumatic tire in which a portion of the shoulder is strongly restrained to reliably prevent diameter growth.

Actual JL example Hereinafter, one embodiment of the present invention will be described based on the drawings.

In Fig. 1.2, 1 is a forming drum for forming tires, and this forming drum 1 has a cylindrical shape and is driven and rotated by a motor (not shown). A screw shaft 2 parallel to the rotating shaft of the molding drum 1 is provided in front of the molding drum 1, and both ends of the screw shaft 2 are rotatably supported by a frame 3. The threaded shaft 2 is formed with a reverse thread B4 with its axial center as a boundary,
Guides 6 are wound around these screws 4, respectively. Both ends of a guide rod 8 parallel to the screw shaft 2 are fixed to the frame 3, and the guide rod 8 is slidably inserted into the guide 6 with the windings guiding the guide 6. In front of the screw shaft 2, a pair of unwinding carts 10 are installed in which a narrow tire component 9 reinforced with a cord is wound up into a roll. They are each unwound at a constant speed by an unwinding roller 12 which is driven and rotated by 11. The tire component 9 unwound by each unwinding roller 12 forms a festoon 13, and then the windings are sent to a guide 6, and these windings are supplied to the forming drum 1 while being guided by the guide 6. Said screw +! A timing pulley 21 is fixed to one end of II2, and a timing belt 25 is passed between the timing pulley 21 and a timing pulley 24 fixed to the output shaft 23 of the motor 22. As a result, the motor 22 When the screw shaft 2 is activated and the screw shaft 2 rotates, the winding guide 8 moves at a constant speed in the axial direction of the forming drum 1 in opposite directions while guiding the tire forming member 9, and winding the tire forming member 8 onto the forming drum 1. Wrap it in a spiral. Further, the frame 3 is moved toward and away from the forming drum 1 by a drive mechanism (not shown). Brake rollers 32 connected to an electromagnetic brake 31 are installed between the guide 6 and the festoon 13, and the tire component 8 is in contact with each brake roller 32 without slipping. When a braking force is applied to this brake roller 32 from the electromagnetic brake 31, a tension corresponding to the braking force is applied to the tire component 9 between the forming drum 1 and the brake roller 32. The aforementioned 'ili magnetic brake 31°brake roller 32
constitutes a tension applying means 33 that applies tension to the tire component 9 as a whole. Directly above the guide rod 8,
Winding is done by detecting each position of the guide 6.
A detection sensor 34 is installed as a detection means for detecting the axial position of the tire component 9, and these detection sensors 34 detect the wrapping guide 6 when the tire component 9 reaches the wrapping start position. and outputs a detection signal to the controller 35. 36 is an electromagnetic brake so that the tension of the tire component 9 wrapped at a position farther from the axial center of the forming drum 1 is greater than the tension of the tire component 9 wrapped near the axial center of the drum 1. 31 is stored in advance, and the program stored in the program setting device 36 includes, for example, the tension in the axial direction of the forming drum 1 as shown by line A in FIG. One that grows linearly as it moves away from the center, one that becomes a dog in a stairway shape as shown by line B, and
There are some that become large along the curve shown by line C. And, such a program can be used to determine the type of tire to be molded,
The winding of the tire component 8 is determined depending on the width, the type of the forming drum 1, etc. When the controller 35 receives a detection signal from the detection sensor 34, the program setting device 3
A corresponding program is called from 6, and a control signal is sent to the electromagnetic brake 31 according to the program to adjust the braking force generated by the electromagnetic brake 31. The controller 3 mentioned above
5. The program setting device 36 as a whole detects the detection sensor 34.
A control means 37 is configured to control the tension applied by the tension applying means 33 to the tire component 9 based on the detection result. An adjuster 38 is provided between the controller 35 and the electromagnetic brake 31, and the adjuster 38 has a winding installed between the guide 6 and the brake roller 32 and a tire component 9.
A feedback signal from a tension detection sensor 38 that detects tension is input.

Then, the regulator 38 compares the control signal from the controller 35 and the feed bank signal from the tension detection sensor 39, and performs feed puncture control on the electromagnetic brake 31.

Next, the operation of one embodiment of the present invention will be explained.

At present, multiple layers of tire components such as carcass ply and belt ply are already wrapped around the forming drum.
On the other hand, it is assumed that the pair of winding guides 6 are waiting while holding the starting end of the tire component 9 at the position closest to each other. Next, when the motor 22 is operated and the screw @2 is rotated, the winding guide 6 moves in the axial direction of the forming drum 1 while being guided by the guide rod 8, and is separated from each other at a constant speed. When the tire component 9 reaches the wrapping start position, the detection sensor 34 detects the wrapping guide 6, stops the operation of the motor 22, and outputs a detection signal to the controller 35. Next, the frame 3 approaches the forming drum 1 by a drive mechanism (not shown), and each winding brings the starting end of the tire component 9 held by the guide B onto the tire component on the forming drum 1. Press and crimp.

Next, the frame 3 returns to the initial position at a distance of # from the forming drum 1, but at this time, since the guide 6 has released the tire component 8 from holding it, the tip of the tire component 9 is wrapped. remains pressed to the forming drum 1. Next, the controller 35 calls a program for controlling the tension of the tire component 8 from the program setting device 36 based on the detection signal from the detection sensor 34, and outputs a control signal according to this program. It is output to the electromagnetic brake 31 via the regulator 38. When the motor 22 is activated again, the winding guide 6 moves in the axial direction of the forming drum 1 while being guided by the guide rod 8 and separates from each other at a constant speed. On the other hand, since the motor 11 of the forming drum 1 and the unwinding roller 12 also rotates in synchronization with the operation of this motor 22, the tire component 9 unwound from the unwinding cart 1O passes through the festoon 13 and then passes through the forming drum 10. It is wound spirally on top of the tire component 1.

When the tire component 8 is wound spirally, the electromagnetic brake 31 applies a braking force corresponding to the control signal to the brake roller 32, and the tension applied to the tire component 8 is adjusted as shown in FIG. 3, for example. control along line A. At this time, the tension applied to the tire component 8 is detected by the tension detection sensor 39, and feedback control is performed by sending a feedback signal from the tension detection sensor 39 to the adjuster 3. As a result, the tire component 9 wrapped around the forming drum 1
The tension is controlled to correspond to the program, that is, to be greater at positions farther from the axial center of the forming drum 1 than at positions closer to the axial center. When the winding width of the tire component 9 thus wound reaches a predetermined value, the operation of the motor 22, the forming drum 1, and the motor 11 is stopped, and the winding is stopped. Next, after cutting the tire component 8 between the forming drum 1 and the wrapping guide 6 using a cutter (not shown), the end portion of the tire component 9 is wound by rotating the forming drum 1. Thereby, the forming drum 1 is wrapped with a layer that partially covers both ends of the belt ply. In this way, the tension of the tire component 9 wound around the forming drum 1 is controlled so that it is greater at positions farther from the axial center of the forming drum 1 than at positions closer to the axial center. Therefore, part of the shoulder of the product tire can be strongly restrained, and diameter growth of the part of the shoulder can be reliably prevented even when traveling at extremely high speeds.

In the above-mentioned embodiment, the tire component 9 is wound with a relatively narrow width to form a layer, but in the present invention, the tire component 9 is wrapped widely to form a cap that covers at least the entire belt bridle. may be configured. In this case, the tension of the tire component 9 may be changed stepwise, for example, as shown in FIG. 4, with the tension being smaller at the center and increasing at both ends. Furthermore, in the above embodiment, the electromagnetic brake 3! By applying braking force to the brake roller 32 from
However, in the present invention, tension may be applied to the tire component 9 by controlling the rotational speed of the motor 11 that drives the unwinding roller 12. In this case, the festoon 13 is omitted and the tire component 9
may be directly supplied from the unwinding roller 12 to the forming drum 1. Furthermore, in this invention, one unwinding roller 1
The unwinding speed of the tire component 9 due to the rotation of 2 and the forming drum The winding speed of the tire component 9 due to the rotation of 1 is constant with the speed, and if the festoon 13 is omitted, the unwinding roller 12 and the forming drum 1 The tire component 9 may be pulled in a direction perpendicular to the running direction of the tire component 8 by a fluid cylinder via a rotating roller, thereby applying tension to the tire component 9. Further, in the present invention, the position of the tire component 9 may be detected by the detection means not only at the winding start position but also over the entire range, or the position of the tire component 8 may be directly detected. You can do it like this. moreover,
The tire component 9 may be wound from both ends of the forming drum 1 toward the center;
The tension values of both may be different. Alternatively, the tension of the tire component 9 to be supplied may be changed and the winding pitch may also be changed, thereby controlling the tension of the wrapped tire component 8.

As described above, according to the present invention, it is possible to easily mold a tire that can reliably prevent the diameter growth of a portion of the shoulder.

[Brief explanation of drawings]

FIG. 1 is a schematic front view showing one embodiment of the present invention, FIG. 2 is a view taken along the line II in FIG. The graph shown in FIG. 4 is a graph showing the tension values of other tire constituent members wound around the forming drum. 1... Forming drum 8... Guide 9 for winding
... Tire component member 33 ... Tension applying means 34 ...
・Detection means 37... Control means patent applicant
Brideston Co., Ltd. Agent Patent Attorney Tao 1) Yu Sotsu Figure 2 Figure 3 Figure 4 Chuo Teito Urine Ichimasa + 吋 (Voluntary) (Layered 63 years 4J421 days)

Claims (1)

[Claims] A rotating molding drum and a molding device installed in front of the molding drum.
A winding guide that spirally wraps the tire component around the forming drum by moving in the axial direction of the forming drum while guiding the band-shaped tire component supplied to the forming drum, and a winding guide that applies tension to the tire component. a tension applying means for applying a tension, a detecting means for detecting the axial position of the tire component, and a tension applying means for changing the tension applied to the tire component based on the detection result of the detecting means, control means for controlling the tension of the tire component wrapped in a position farther from the axial center of the tire so that the tension of the tire component wrapped in a position farther from the axial center is greater than the tension of the tire component wrapped in a position closer to the axial center of the tire. A winding device for a tire component, characterized in that: